Represents the amount of benefits expected to be paid in following the latest fiscal year from a defined benefit plan.

No definition available.

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- Definition

Represents the period of operating history and sufficient trading volume of invested entity.

+ References

No definition available.

+ Details

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- Definition

Amount of benefits expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year from a defined benefit plan.

+ References

+ Details

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- Definition

Amount of benefits expected to be paid in the next fiscal year following the latest fiscal year from a defined benefit plan.

+ References

+ Details

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- Definition

Amount of benefits expected to be paid in the fifth fiscal year following the latest fiscal year from a defined benefit plan.

+ References

+ Details

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- Definition

Amount of benefits expected to be paid in the fourth fiscal year following the latest fiscal year from a defined benefit plan.

+ References

+ Details

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- Definition

Amount of benefits expected to be paid in the third fiscal year following the latest fiscal year from a defined benefit plan.

+ References

+ Details

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- Definition

Amount of benefits expected to be paid in the second fiscal year following the latest fiscal year from a defined benefit plan.

+ References

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- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Section 35

-Paragraph 50

-URI http://asc.fasb.org/extlink&oid=6867990&loc=d3e12355-114930

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 87

-Paragraph 49

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph d(iv)(b)(i)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

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- Definition

Target allocation of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(i)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)(i)

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- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(1)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph d(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 11

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Employee Benefit Plans (Details 3) (USD $)	12 Months Ended
Employee Benefit Plans (Details 3) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
401(k) retirement plan
Expense recognized in the 401(k) retirement plan	$ 5,000,000	$ 5,200,000	$ 5,300,000
Pension plans
Employee Benefits Plans
Fair value of plan assets	102,174,000	93,002,000	97,497,000
Expected future pension benefit payments
2013	8,440,000
2014	8,695,000
2015	8,947,000
2016	9,154,000
2017	9,371,000
2018-2022	50,576,000
Total	95,183,000
Frozen pension plan
Employee Benefits Plans
Fair value of plan assets	102,174,000	93,002,000
Acceptable Range (as a percent)	100.00%	100.00%
Frozen pension plan \| Minimum
Expected future pension benefit payments
Period of operating history and sufficient trading volume of invested entity	5 years
Frozen pension plan \| Domestic Equities
Employee Benefits Plans
Target (as a percent)	50.00%
Frozen pension plan \| Domestic Equities \| Minimum
Employee Benefits Plans
Acceptable Range (as a percent)	35.00%
Frozen pension plan \| Domestic Equities \| Maximum
Employee Benefits Plans
Acceptable Range (as a percent)	75.00%
Frozen pension plan \| Large Cap Growth
Employee Benefits Plans
Target (as a percent)	22.50%
Frozen pension plan \| Large Cap Growth \| Minimum
Employee Benefits Plans
Acceptable Range (as a percent)	15.00%
Frozen pension plan \| Large Cap Growth \| Maximum
Employee Benefits Plans
Acceptable Range (as a percent)	30.00%
Frozen pension plan \| Large Cap Value
Employee Benefits Plans
Target (as a percent)	22.50%
Frozen pension plan \| Large Cap Value \| Minimum
Employee Benefits Plans
Acceptable Range (as a percent)	15.00%
Frozen pension plan \| Large Cap Value \| Maximum
Employee Benefits Plans
Acceptable Range (as a percent)	30.00%
Frozen pension plan \| Mid Cap Value
Employee Benefits Plans
Target (as a percent)	5.00%
Frozen pension plan \| Mid Cap Value \| Minimum
Employee Benefits Plans
Acceptable Range (as a percent)	5.00%
Frozen pension plan \| Mid Cap Value \| Maximum
Employee Benefits Plans
Acceptable Range (as a percent)	15.00%
Frozen pension plan \| Mid Cap Growth
Employee Benefits Plans
Target (as a percent)	0.00%
Frozen pension plan \| Mid Cap Growth \| Minimum
Employee Benefits Plans
Acceptable Range (as a percent)	0.00%
Frozen pension plan \| Mid Cap Growth \| Maximum
Employee Benefits Plans
Acceptable Range (as a percent)	10.00%
Frozen pension plan \| Domestic Fixed Income
Employee Benefits Plans
Target (as a percent)	35.00%
Frozen pension plan \| Domestic Fixed Income \| Minimum
Employee Benefits Plans
Acceptable Range (as a percent)	15.00%
Frozen pension plan \| Domestic Fixed Income \| Maximum
Employee Benefits Plans
Acceptable Range (as a percent)	50.00%
Frozen pension plan \| International Equities
Employee Benefits Plans
Target (as a percent)	15.00%
Frozen pension plan \| International Equities \| Minimum
Employee Benefits Plans
Acceptable Range (as a percent)	10.00%
Frozen pension plan \| International Equities \| Maximum
Employee Benefits Plans
Acceptable Range (as a percent)	25.00%
Frozen pension plan \| LM Institutional Fund Advisors I, Inc. Western Asset Core Plus
Employee Benefits Plans
Fair value of plan assets	16,793,000	15,470,000
Acceptable Range (as a percent)	15.00%	17.00%
Frozen pension plan \| State Street Government STIF 15
Employee Benefits Plans
Fair value of plan assets	14,419,000	5,109,000
Acceptable Range (as a percent)	13.00%	6.00%
Frozen pension plan \| PIMCO Total Return Fund Institutional Class
Employee Benefits Plans
Fair value of plan assets	$ 14,088,000	$ 12,765,000
Acceptable Range (as a percent)	13.00%	14.00%